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Jetir RMS

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This paper presents a case study of Jodhpur City in which An attempt has been made in this study to prepare an inventory of pollutant (PM10, PM2.5, SO2, NOx, CO) at regional level to know the current cumulative air pollution load in the study area and thereafter computing National Air Quality Index by computing sub index for every pollutant to have germane idea of status of air quality in the region. Monitoring stations were set up at seven different locations and samples have been analysed and subsequently air quality index has been computed. The sampling of the above pollutants was recorded continuously on 8 hourly basis for 24 hours on seven days. Sampling was done from 15 Jan 2016 to 7-Feb- 2016. The results reveal that gaseous pollutants such as SO2, NO2 & CO are within the permissible limits. PM2.5 levels exceed the prescribed National Ambient Air Quality standards (NAAQS) and PM10 levels also exceeded the prescribed NAAQS during all the monitoring location thus particulate matter is the predominant cause of air pollution in the study area. The AQIs were calculated using IND-AQI procedure. It has been observed that the calculated AQIs value for SO2 falls under ‘good’ category. The calculated AQIs values for NO2 & CO fall under ‘good’ and ‘satisfactory’ categories. The calculated AQIs values of PM10 fall under ‘moderate’ and ‘poor’ categories. The calculated AQIs values of PM2.5 fall under ‘moderate’, ‘poor’ and also in ‘very poor’ categories. The overall AQI was found to fall under the category ‘Poor’ owing to PM2.5. Thus it is observed that PM2.5 is responsible pollutant at these seven locations in Jodhpur.